Top Flite A0965 INSTRUCTION BOOK

WARRANTY.....Top Flite Models guarantees this kit to be free
from defects in both material and workmanship at the date of purchase. This warranty does not cover any component parts damaged by use or modifi cation. In no case shall Top Flite’s liability exceed the original cost of the purchased kit. Further, Top Flite reserves the right to change or modify this warranty without notice.
In that Top Flite has no control over the fi nal assembly or material used for fi nal assembly, no liability shall be assumed nor accepted for any damage resulting from the use by the user of the fi nal user-assembled product. By the act of using the user­assembled product, the user accepts all resulting liability.
Wingspan: 69 in [1755mm] Wing Area: 730 sq in [47.1 dm2] Weight: 8.5-9.5 lb [3855-4310g] Wing Loading: 27-30 oz/sq ft [82-91 g/dm2] Length: 51 in [1295mm] Radio: 6 channel w/8 servos Engine: .60 cu in [10cc] two-stroke,
.70-.91 cu in [11.5-15cc] four-stroke
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return this kit immediately in new and unused condition to the place of purchase.
To make a warranty claim send the defective part or item to Hobby Services at the address:
Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign IL 61822 USA
Include a letter stating your name, return shipping address, as much contact information as possible (daytime telephone number, fax number, e-mail address), a detailed description of the problem and a photocopy of the purchase receipt. Upon receipt of the package the problem will be evaluated as quickly as possible.
READ THROUGH THIS MANUAL BEFORE STARTING CONSTRUCTION. IT CONTAINS IMPORTANT INSTRUCTIONS AND WARNINGS CONCERNING THE ASSEMBLY AND USE OF THIS MODEL.
Top Flite Models Champaign, IL Telephone (217) 398-8970, Ext. 5 airsupport@top-fl ite.com
Entire Contents © Copyright 2008 TOPA0965Mnl V1.0
TABLE OF CONTENTS
INTRODUCTION ..................................................... 2
SAFETY PRECAUTIONS .......................................2
DECISIONS YOU MUST MAKE .............................. 3
Radio Equipment .................................................. 3
Engine Recommendations ...................................3
ADDITIONAL ITEMS REQUIRED ..........................3
Adhesives and Building Supplies ..........................3
Optional Supplies and Tools .................................4
IMPORTANT BUILDING NOTES ............................ 4
KIT CONTENTS ...................................................... 4
ORDERING REPLACEMENT PARTS .................... 5
PREPARATIONS ..................................................... 6
ASSEMBLE THE WING .......................................... 6
Install the Flaps/Ailerons ......................................6
Install the Aileron/Flap Servos and Pushrods ....... 8
Install the Wing Joiners & Join the Wing Halves.. 10
Install the Retract Landing Gear and Wheels ..... 13
BUILD THE FUSELAGE .......................................15
Install the Stabilizers, Elevators and Rudder ...... 15
Install the Engine Fuel Tank & Throttle Servo ..... 18
Install the Radio System ..................................... 20
Final Set-up of the Retract Servo ....................... 21
Install the Cowl & Dummy Engine ...................... 22
Install the Cockpit & Remaining Scale Details .... 24
Apply the Decals ................................................. 26
GET THE MODEL READY TO FLY ....................... 27
Check the Control Directions .............................. 27
Set the Control Throws ....................................... 27
Balance the Model (C.G.) ................................... 28
Balance the Model Laterally ............................... 29
PREFLIGHT .......................................................... 29
Identify Your Model ............................................. 29
Charge the Batteries ........................................... 29
Balance Propellers .............................................29
Ground Check ..................................................... 29
Range Check ......................................................29
ENGINE SAFETY PRECAUTIONS .......................30
AMA SAFETY CODE ............................................ 30
CHECK LIST ......................................................... 30
FLYING .................................................................. 31
Fuel Mixture Adjustment ..................................... 31
Takeoff ................................................................31
Flight .....................................................Back Cover
Landing .................................................Back Cover
INTRODUCTION
The real lineage of the AT-6 Texan began in 1937 with a USAAF competition to develop a basic trainer. The requirements were for a type capable of basic instruction as well as simulating the controls and feel of an actual combat aircraft. Top Flite has returned this vintage airplane to the modeling community in the form of a “World Class” ARF that we are sure will bring you hours of great fun.
For the latest technical updates or manual corrections to the AT-6 Texan visit the Top Flite web site at www. top-fl ite.com. Open the “Airplanes” link, and then select the AT-6 Texan ARF. If there is new technical information or changes to this model a “tech notice” box will appear in the upper left corner of the page.
ACADEMY OF MODEL AERONAUTICS
If you are not already a member of the AMA, please join! The AMA is the governing body of model aviation and membership provides liability insurance coverage, protects modelers’ rights and interests and is required to fl y at most R/C sites.
Academy of Model Aeronautics
5151 East Memorial Drive
Muncie, IN 47302-9252
Tele. (800) 435-9262
Fax (765) 741-0057
www.modelaircraft.org
IMPORTANT!!! Two of the most important things you
can do to preserve the radio controlled aircraft hobby are to avoid fl ying near full-scale aircraft and avoid fl ying near or over groups of people.
SCALE COMPETITION
Though the Top Flite AT-6 is an ARF and may not have the same level of detail as an “all-out” scratch-built competition model, it is a scale model nonetheless
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and is therefore eligible to compete in the Fun Scale class in AMA competition (we receive many favorable reports of Top Flite ARFs in scale competition!). In Fun Scale, the “builder of the model” rule does not apply. To receive the fi ve points for scale documentation, the only proof required that a full size aircraft of this type in this paint/markings scheme did exist is a single sheet such as a kit box cover from a plastic model, a photo, or a profi le painting, etc. If the photo is in black and white other written documentation of color must be provided. Contact the AMA for a rule book with full details.
If you would like photos of full-size AT-6s for scale documentation, or if you would like to study the photos to add more scale details, photo packs are available from:
Bob’s Aircraft Documentation
3114 Yukon Ave
Costa Mesa, CA 92626
Telephone: (714) 979-8058
Fax: (714) 979-7279
www.bobsairdoc.com
PROTECT YOUR MODEL, YOURSELF AND OTHERS. FOLLOW THESE IMPORTANT SAFETY PRECAUTIONS
1. Your AT-6 should not be considered a toy, but rather a sophisticated, working model that functions very much like a full-size airplane. Because of its performance capabilities, the AT-6, if not assembled and operated correctly, could possibly cause injury to yourself or spectators and damage to property.
2. You must assemble the model according to the instructions. Do not alter or modify the model, as doing so may result in an unsafe or unfl yable model. In a few cases the instructions may differ slightly from the photos. In those instances the written instructions should be considered as correct.
3. You must take time to build straight, true and strong.
4. You must use an R/C radio system that is in fi rst­class condition, and a correctly sized engine and components (fuel tank, wheels, etc.) throughout the building process.
5. You must correctly install all R/C and other components so that the model operates correctly on the ground and in the air.
6. You must check the operation of the model before every fl ight to insure that all equipment is operating and that the model has remained structurally sound. Be sure to check clevises or other connectors often and replace them if they show any signs of wear or fatigue.
7. If you are not an experienced pilot or have not fl own this type of model before, we recommend that you get the assistance of an experienced pilot in your R/C club for your fi rst fl ights. If you’re not a member of a club, your local hobby shop has information about clubs in your area whose membership includes experienced pilots.
8. While this kit has been fl ight tested to exceed normal use, if the plane will be used for extremely high stress fl ying, such as racing, or if an engine larger than one in the recommended range is used, the modeler is responsible for taking steps to reinforce the high stress points and/or substituting hardware more suitable for the increased stress.
We, as the kit manufacturer, provide you with a top quality, thoroughly tested kit and instructions, but ultimately the quality and fl yability of your fi nished model depends on how you build it; therefore, we cannot in any way guarantee the performance of your completed model, and no representations are expressed or implied as to the performance or safety of your completed model.
Remember: Take your time and follow the instructions to end up with a well-built model that is straight and true.
DECISIONS YOU MUST MAKE
This is a partial list of items required to fi nish the AT-6 that may require planning or decision making before starting to build. Order numbers are provided in parentheses.
RADIO EQUIPMENT
ADDITIONAL ITEMS REQUIRED
ADHESIVES AND BUILDING SUPPLIES
This is the list of Adhesives and Building Supplies that are required to fi nish the AT-6.
1/2 oz. [15g] Thin Pro1 oz. [30g] Medium Pro CA+ (GPMR6008)Pro 30-minute epoxy (GPMR6047)Pro 6-minute epoxy (GPMR6045)R/C foam rubber (1/4" [6mm] - HCAQ10003’ [900mm] standard silicone fuel tubing
(GPMQ4131)
Dr ill bits: 1/16" [1.6mm], 5/64" [2mm], 3/32" [2.4mm],
7/64" [2.8mm], 1/8" [3.2mm], 9/64" [3.6mm].
8-32 tap and drill set (GPMR8103)Small T-pins (100, HCAR5100)#1 Hobby knife (HCAR0105)#11 blades (5-pack, HCAR0211)Stick-on segmented lead weights (GPMQ4485)
st
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Century® sealing iron (COVR2700)
4 oz. [113g] aerosol CA activator (GPMR634)CA applicator tips (HCAR3780)Epoxy brushes (6, GPMR8060)Mixing sticks (50, GPMR8055)Mixing cups (GPMR8056)Microballoons (TOPR1090)Threadlocker thread locking cement (GPMR6060)Denatured alcohol (for epoxy clean up)
CA (GPMR6001)
9. WARNING: The cowl and air scoops included in this kit are made of fi berglass, the fi bers of which may cause eye, skin and respiratory tract irritation. Never blow into a part to remove fi berglass dust, as the dust will blow back into your eyes. Always wear safety goggles, a particle mask and rubber gloves when grinding, drilling and sanding fi berglass parts. Vacuum the parts and the work area thoroughly after working with fi berglass parts.
6-channel with seven servos of at least 50 oz-in.
and one retract servo of at least 60 oz-in.
One 6" [150mm] servo extension (HCAM2701 for
Futaba)
Seven 12" [300mm] servo extension (HCAM2711
for Futaba)
Two Y-harnesses (HCAM2751 for Futaba)1000 mAh battery (minimum)
ENGINE RECOMMENDATIONS
The recommended engine for the AT-6 is an O.S.® .60 two-stroke or .91 four-stroke.
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OPTIONAL SUPPLIES AND TOOLS
Here is a list of optional tools mentioned in the manual that will help you build the AT-6.
Masking tape (TOPR8018)Panel Line Pen (TOPQ2510)Rotary tool such as Dremel
®
Rotary tool reinforced cut-off wheel (GPMR8020)Servo horn drill (HCAR0698)Hobby HeatAccuThrow
micro torch (HCAR0750)
Defl ection Gauge (GPMR2405)
Precision Magnetic Prop Balancer (TOPQ5700)CG MachineDead Center
Locator (GPMR8130)
(GPMR2400)
Engine Mount Hole
IMPORTANT BUILDING NOTES
• There are two types of screws used in this kit:
Sheet metal screws are designated
by a number and a length. For example #6 x 3/4" [19mm]
Machine screws are designated
by a number, threads per inch, and a length. For example 4-40 x 3/4" [19mm]
Socket Head Cap Screws (SHCS)
are designated by a number, threads per inch, and a length. For example, 4-40 x 3/4" [19mm]
• When you see the term test fi t in the instructions, it means that you should fi rst position the part on the assembly without using any glue, then slightly modify or custom fi t the part as necessary for the best fi t.
• Whenever the term glue is written you should rely upon your experience to decide what type of glue to use. When a specifi c type of adhesive works best for that step, the instructions will make a recommendation.
• Whenever just epoxy is specifi ed you may use either 30-minute (or 45-minute) epoxy or 6-minute epoxy. When 30-minute epoxy is specifi ed it is highly recommended that you use only 30-minute (or 45-minute) epoxy, because you will need the working time and/or the additional strength.
Photos and sketches are placed before the step they refer to. Frequently you can study photos in following steps to get another view of the same parts.
• The AT-6 is factory-covered with Top Flite MonoKote® fi lm. Should repairs ever be required, MonoKote can be patched with additional MonoKote purchased separately. MonoKote is packaged in six-foot rolls, but some hobby shops also sell it by the foot. If only a small piece of MonoKote is needed for a minor patch, perhaps a fellow modeler would give you some. MonoKote is applied with a model airplane covering iron, but in an emergency a regular iron could be used. A roll of MonoKote includes full instructions for application. Following are the colors used on this model and order numbers for six foot rolls.
Aluminum (TOPQ0205) Black (TOPQ0208) Cub Yellow (TOPQ0220) Missile Red (TOPQ0201)
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KIT INSPECTION
Before starting to build, inspect the parts to make sure they are of acceptable quality. If any parts are missing or are not of acceptable quality, or if you need assistance with assembly, contact Product Support. When reporting defective or missing parts, use the part names exactly as they are written in the Kit Contents list on this page.
Top Flite Product Support:
3002 N Apollo Drive Suite 1
Champaign, IL 61822
Telephone: (217) 398-8970
Fax: (217) 398-7721
E-mail: airsupport@top-fl ite.com
KIT CONTENTS
1. Right wing with aileron and fl ap
2. Left wing with aileron and fl ap
3. Joiner covers (2)
4. Horizontal stabilizer with elevators
5. Rudder
6. Tail wheel assembly
7. Fuselage
8. Wing center section with fl aps
9. Cowl
10. Main wheels (2)
11. Main retract assembly (2)
12. Fiberglass exhaust stack
13. Fuel tank
14. Engine mount halves (R&L)
15. Fiberglass dummy engine
16. Spinner
17. Cockpit fl oor
18. Fiberglass air scoops (2)
19. Pilots (2)
20. Turnover post
21. Canopy
ORDERING REPLACEMENT PARTS
To order replacement parts for the Top Flite AT-6 ARF, use the order numbers in the Replacement Parts List that follows. Replacement parts are available only as listed. Not all parts are available separately (an aileron cannot be purchased separately, but is only available with the wing kit). Replacement parts are not available from Product Support, but can be purchased from hobby shops or mail order/Internet order fi rms. Hardware items (screws, nuts, bolts) are also available from these outlets. If you need
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3
5
1
assistance locating a dealer to purchase parts, visit www.top-fl ite.com and click on “Where to Buy.” If this kit is missing parts, contact Product Support.
REPLACEMENT PARTS LIST
7
8
11
10
9
13
18
11
3
2
4
Order Number Description How to purchase
Missing Pieces .................. Contact Product Support
Instruction Manual ............ Contact Product Support
Full-Size Plans .....................................Not Available
Contact your hobby supplier to purchase these items:
TOPA1740 ....... Wing
TOPA1741 ....... Fuselage
TOPA1742 ....... Tail Surface Set
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15
18
10
16
17
19
19
20
21
TOPA1743 ....... Canopy
TOPA1744 ....... Cowl
TOPA1745 ....... Dummy Radial Engine
GPMQ9117 ...... Pilot
TOPA1746 ....... Decals
TOPA1747 ....... Spinner
TOPA1748 ....... Wire Landing Gear Set
TOPA1749 ....... Cockpit Kit
TOPA1750 ....... Wheels
TOPQ7950 ......Retracts w/o Wires
TOPA1751 ....... Fiberglass Scoop/Exhaust Set (3 pc.)
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PREPARATION
ASSEMBLE THE WING
1. If you have not done so already, remove the
major parts of the kit from the box and inspect for damage. If any parts are damaged or missing, contact Product Support at the address or telephone number listed in the “Kit Inspection” section on page 4.
2. Remove the tape and separate the ailerons and
fl aps from the wing and the elevators from the stab. Use a covering iron with a covering sock on high heat to tighten the covering if necessary. Apply pressure over sheeted areas to thoroughly bond the covering to the wood.
INSTALL THE FLAPS/AILERONS
Do the bottom right wing fi rst so your work matches the photos the fi rst time through.
❏ ❏ 1. Drill a 3/32" hole, 1/2" deep in the center of
each hinge slot to allow the CA to “wick” in. Follow­up with a #11 blade to clean out the slots. Hint: If you have one, use a high-speed rotary tool to drill the holes.
1"
1"
CLIP CORNERS
❏ ❏ 3. Cut twelve 1" x 1" [25 x 25mm] hinges from
a CA hinge strip. Snip off the corners so they go in easier.
2. Use a sharp #11 blade to cut a strip of covering
from the hinge slots in the wing and aileron.
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4. Test fi t the aileron to the wing with the hinges.
If the hinges don’t remain centered, stick a pin through the middle of the hinge to hold it in position.
❏ ❏ 5. Remove any pins you may have inserted into
the hinges. Adjust the aileron so there is a small gap between the LE of the aileron and the wing. The gap should be small, just enough to see light through or to slip a piece of paper through.
❏ ❏ 6. Apply six drops of thin CA to the top and
bottom of each hinge. Do not use CA accelerator. After the CA has fully hardened, test the hinges by pulling on the aileron.
the holes in the trailing edge of the wing. Insert the fl ap into the wing. Align the hinges with the pivot point in the hinge pocket and so the hinge pivots perpendicular to the leading edge of the fl ap. Be sure the fl ap is pushed close enough to the trailing edge of the wing so the fl ap sits completely fl ush with the bottom of the wing.
❏ ❏ 10. Set the assembly aside until the glue cures.
11. Repeat steps 1- 10 for the left wing panel.
❏❏7. Locate three hinge point hinges. Apply a
drop of oil or apply a small amount of Vaseline into the hinge pin. This will keep glue from getting into the hinge and preventing it from moving freely. Be careful not to get oil on the hinge point. If you do, clean it with a cloth and alcohol.
❏ ❏ 8. Apply 30-minute epoxy to one side of each
hinge and using a toothpick work a small amount of epoxy into each of the holes for the hinge in the leading edge of the fl ap. Insert one hinge into each hole.
❏ ❏ 9. Clean excess epoxy from the hinge and
fl ap. Apply epoxy to the other end of the hinge and
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12. Using the same technique used for the wing
fl aps, install four hinges into the fl ap of the wing center section.
13. After the glue has completely cured work the
fl ap hinges until they move smoothly.
Did you know…The AT-6 advanced trainer was one of the most widely used aircraft in history. Most AAF fi ghter pilots trained in AT-6s prior to graduation from fl ying school. Many of the “Spitfi re” and “Hurricane” pilots in the Battle of Britain trained in Canada in “Harvards,” the British version of the AT-6.
INSTALL THE AILERON/FLAP SERVOS AND PUSHRODS
1. Remove the aileron and fl ap covers from the
right wing panel.
❏ ❏ 3. Drill a 1/16" [1.6mm] hole through the servo
cover into the center of the servo mounting blocks. Install and then remove a #2 x 3/8" [10mm] wood screw into the holes you drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has cured install the screws into the servo cover.
❏ ❏ 4. Install a 12" servo extension onto the servo
lead. Secure the extension to the lead with tape, a piece of shrink tube or some other method to keep them from coming unplugged.
remove a servo mounting screw into each of the holes you have drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has cured install the servo onto the servo cover using the hardware included with your servo. Center the servo. Then install a servo arm as shown.
❏ ❏ 6. Inside the servo bay a string is taped. Tie the
string to the servo extension. Pull the string and the servo lead through the wing. Do not untie the string from the servo lead.
❏ ❏ 2. Glue two 5/16" x 3/4" x 3/4" [8 x 19 x 19mm]
hardwood blocks to the servo cover. Position the blocks so the servo fi ts between the blocks and the servo horn is centered in the opening.
❏❏5. Using a 5/64" [2mm] drill bit, enlarge the
outer hole on the servo horn. Place the servo onto the servo mounting blocks. Drill through the servo mounting holes with a 1/16" [1.6mm] drill bit. Remove the servo from the servo cover. Install and then
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[10mm] screw into each of the holes. Apply a couple drops of thin CA into the holes to harden the threads. Once the glue has hardened attach the horn to the aileron with two #2 x 3/8" [10mm] screws.
❏ ❏ 12. Place the servo onto the servo mounting
blocks. Drill through the servo mounting holes with a 1/16" [1.6mm] drill bit. Remove the servo from the servo cover. Install and then remove a servo mounting screw into each of the holes you have drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has cured install the servo onto the servo cover using the hardware included with your servo. Center the servo and then install a servo arm as shown.
7. Place the servo cover onto the wing. The
opening for the servo arm should be pointed towards the wing tip. Drill a 1/16" [1.6mm] hole
through each corner of the cover. Remove the cover. Then install and remove a #2 x 3/8" [10mm] screw into the holes you drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has hardened, mount the servo cover with #2 x 3/8" [10mm] screws and #2 fl at washers.
❏❏8. Place a nylon control horn in line with the
outer hole in the servo arm. When positioned properly the control horn will rest on a hardwood plate in the aileron. Mark the location of the mounting holes onto the aileron. Drill a 1/16" [1.6mm] hole on the marks, drilling through the plywood plate but not through the top of the aileron. Insert and remove a #2 x3/8"
❏ ❏ 9. Screw a nylon clevis onto a .074 x 6" [152mm]
threaded wire 20 turns. Slide a nylon clevis retainer onto the clevis. Install the clevis into the second hole from the end of the control horn. Then slide the silicone retainer over the clevis. Center the servo and the aileron. With a fi ne tip marker, mark the wire where it aligns with the outer hole of the servo arm. Make a 90 degree bend on the mark. Cut the wire so the wire is 3/8" [10mm] in length after the bend. Insert the wire into the servo arm and lock it in place with a nylon Faslink.™
❏ ❏ 10. Glue two 5/16" x 3/4" x 3/4" [8 x 19 x 19mm]
hardwood blocks to the fl ap servo cover. Position the blocks so the servo fi ts between the blocks.
❏ ❏ 11. Drill a 1/16" [1.6mm] hole through the servo
cover into the center of the servo mounting blocks. Install and then remove a #2 x 3/8" [10mm] wood screw into the holes you drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has cured install the screws into the servo cover.
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❏ ❏ 13. Tie the fl ap servo lead to the string with the
aileron servo lead. This one string will be used to pull the leads through the wing center section.
❏ ❏ 14. Place the fl ap servo cover onto the wing. For
the right wing the opening for the servo arm should be pointed towards the wing tip. (For the left wing
the servo will be located toward the root rib.) Drill a 1/16" [1.6mm] hole through each corner of the cover. Remove the cover. Then install and remove a #2 x 3/8" [10mm] screw into the holes you drilled. Apply a drop of thin CA into the holes to harden the threads. Once the glue has hardened, mount the servo cover with #2 x 3/8" [10mm] screws and #2 fl at washers.
❏ ❏ 16. Screw a nylon clevis onto a .074 x 6"
[152mm] threaded wire 20 turns. Slide a nylon clevis retainer onto the clevis. Install the clevis into the second hole from the end of the control horn. Then slide the silicone retainer over the clevis. Position the fl ap tight to the bottom of the wing. Position the servo arm so that it is pointed towards the trailing edge of the wing. With a fi ne tip marker, mark the wire where it aligns with the outer hole of the servo arm. Make a 90 degree bend on the mark. Cut the wire so the wire is 3/8" [10mm] in length after the bend. Insert the wire into the servo arm and lock it in place with a nylon Faslink.
INSTALL THE WING JOINERS AND JOIN THE WING HALVES
Important! Be sure to take your time and follow the instructions for installing the wing joiners. Because of the unusual angles of the joiner it can be confusing. Taking your time will insure a proper assembly. It is recommended that you read completely through the instructions and pay attention to the pictures before proceeding with the joiner and joining the wing.
❏❏15. Place a nylon control horn in line with the
outer hole in the servo arm. Place the nylon control horn backwards from what would be considered the normal mounting position, in line with the outer hole in the servo arm. (This provides better mechanical advantage for the fl ap operation). When positioned properly the control horn will rest on a hardwood plate in the fl ap. Mark the location of the mounting holes onto the fl ap. Drill a 1/16" [1.6mm] hole on the marks, drilling through the plywood plate but not through the top of the fl ap. Insert and remove a #2 x3/8" [10mm] screw into each of the holes. Apply a couple drops of thin CA into the holes to harden the threads. Once the glue has hardened attach the horn to the fl ap with two #2 x 3/8" [10mm] screws.
17. Repeat steps 1-15 for the left wing panel.
Important! At step 13 pay close attention to be sure you install the fl ap servo properly for the left wing.
1. Locate two hardwood wing joiners. Slide the
joiners completely into the joiner pocket of the wing center section. When you have the joiners matched to the correct side of the wing center section, they will fi t without force. There will be a slight upward angle of the joiner extending from the center section.
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